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Black velvet box cushion with cool gray piping and a clipped corner on a concrete window ledge in an exposed brick loftSave

A Reading by RosaWindow Seat Cushions

A black velvet window seat cushion on a brick loft ledge, and the corner that leans

A concrete ledge in a brick loft is about as far from a porch as a seat gets. Still, this one tells you its shape before you sit down.

Black velvet and gray piping against steel windows and raw brick: a seat that suits an industrial loft.

Read by

The Porch Keeper of SavannahPublished Updated 4 min read

The quick answer

A window seat cushion for a ledge with an angled end should be a box cushion cut to follow the ledge, with the odd corner clipped to match instead of forced square. Measure or trace the angled end, keep a piped box edge to hold the outline, and make a very large one-piece seat as flat foam rather than tufted.

Black velvet on a concrete sill, and why it doesn't feel cold

Most folks would put a pale cushion in a room this hard: concrete ledge, concrete floor, black steel windows, raw brick. This window seat cushion goes the other way. Black velvet, piped in cool gray, sitting on the ledge like it was poured with the concrete.

It works because velvet drinks light. Beside that much glass, a shiny fabric would glare all afternoon; black velvet reads soft and deep instead, and the steel frames above join it into one graphic block. The brick does the warming.

There are no pillows, no throw, no plant. On my grandmother's porch a cushion got a pillow whether it wanted one or not, and I'd usually argue for one, neighbor. Not here. In a loft built from straight lines, one sharp, well-piped cushion matches the architecture, and anything soft on top would blur the shape the seat is about.

More ledges live under window seat cushions and living room cushions; the pile has its own shelf in velvet.

Five pins, from velvet to brick

Five pins, starting on the black velvet and working out to the brick that keeps it warm.

Pinned: Black velvet box cushion with cool gray piping and a clipped corner on a concrete window ledge in an exposed brick loft
  1. Black velvet top

    Velvet absorbs light, so next to big windows it reads soft rather than glaring.

  2. Cool gray piping

    Echoes the concrete ledge and outlines the shape.

  3. Clipped corner

    One corner is cut on the angle to follow the ledge.

  4. Steel windows

    Black frames and black velvet make one graphic block.

  5. Exposed brick

    Warm raw brick keeps the black from feeling cold.

  1. Black velvet topVelvet absorbs light, so next to big windows it reads soft rather than glaring.
  2. Cool gray pipingEchoes the concrete ledge and outlines the shape.
  3. Clipped cornerOne corner is cut on the angle to follow the ledge.
  4. Steel windowsBlack frames and black velvet make one graphic block.
  5. Exposed brickWarm raw brick keeps the black from feeling cold.

The clipped corner: let the ledge tell the cushion its shape

Look at the far end. One corner is cut on the angle because the ledge is. That's the whole edge-and-shape decision in one picture, and it's where a lot of window seat orders go sideways.

A box edge gives the cushion a straight side band (the gusset), so the angle holds as a clean line. A knife edge, two panels sewn straight together, would round that corner into something like a pillow. Against steel and concrete, box is the honest choice, and the gray piping draws the outline so you can check the angle from across the room.

To order one, measure the front, the back and the depth, then how far the clip runs along the front and along the side. Or trace the ledge on paper and let the trapezoid cushion calculator check your numbers. Say which corner you mean, too: a clipped corner is cut straight across, while rounded corners follow a curve.

So what does the far end of your ledge do: stay square, or lean?

A real project

Too big to tuft: an 84-inch seat in one piece

A buyer got in touch about a large, nearly square window seat. They'd fallen for our tufted, Japanese-style floor cushion and wanted it in velvet, in one piece, at about 84 x 59 1/2 in (214 x 151 cm).

At that size tufting wasn't possible, and the workshop said so plainly. It offered the untufted bench-cushion style instead: foam-filled, flat, one piece, in dark navy velvet with matching navy piping.

I tell that one on the porch whenever somebody wants a mattress-sized cushion with buttons. Big seats want flat foam. Save the tufting for pieces you can get your arms around.

A window seat cushion should follow the ledge: if one end of the ledge is cut on an angle, clip that corner of the cushion to match instead of forcing it square.

Rosa
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Buyer questions: bolsters, classroom benches and one handle

  1. A common question

    Can you make long, round bolster backrests to match the seat cushions on my dining bench?

    The workshop's answer

    Yes. The workshop makes cylindrical bolster backrests with rounded ends in the seat fabric, for example about 50 in and 41 in (128 and 105 cm) long to sit behind 18 in (46 cm) deep seats of the same lengths. Send reference photos or a sketch for an accurate quote.

  2. A common question

    Could you make cushions for the reading benches in our office, or for a couple of classrooms?

    The workshop's answer

    Yes. Send a photo of the benches with each section's measurements for a quote. The workshop has made 40 x 40 in (102 x 102 cm) corner cushions for early-learning classrooms and multi-section office bench cushions.

  3. A common question

    Does the cushion come with a handle, and can you put it on a particular side?

    The workshop's answer

    Each cushion comes with one handle, placed where you ask, such as on the shorter 45 1/4 in (115 cm) side. More handles can be added on request.

On the cutting table

CushionWindow seat cushion, one piece, box edge
ShapeOne corner clipped on the angle to follow the ledge
FabricBlack velvet
PipingContrast, cool gray, echoing the concrete
SettingConcrete ledge, black steel windows, exposed brick
PropsNone; the architecture does the styling
HandleOne, on the side you ask for; more on request
Very large seatsFlat foam, untufted

Order this cushion

Have it made

Have this made — ask Rosa’s workshop

Swings sway, rockers rock, dogs circle three times. Tell the workshop what your seat goes through, and they will plan for it. — Rosa

Leave your details and the workshop will call you to confirm measurements, fabric, foam and piping. No prices, dates or payment on this page: it is a request, not an order.

Fabric · Foam · Pipingwhat the workshop will confirm with you

Fabric
Black velvet
Foam
Flat foam
Piping
Contrast, cool gray, echoing the concrete
Only for this request: no marketing calls or texts. Outside the US, add the country code.
In inches: length × depth × thickness, plus any angles or cut corners.

* Required. A member of the workshop team will call you to talk it through; nothing is charged and nothing is made until you have agreed on every detail with them.

We use these details only to answer this request and make your cushion: your name and contact details, the cushion details and photos you send, the page you came from and the ad or link that brought you, if any. The workshop that makes the cushions receives them. We don't sell them or share them for advertising, and we delete requests after 24 months. Privacy notice for requests.

Nothing is made or charged until you approve the details.

Want to pick the shape and add photos? Use the full quote form

Questions buyers ask next

What is the difference between a clipped corner and a rounded corner on a seat cushion?

A clipped corner is cut straight across at an angle, giving the cushion a short extra side. A rounded corner follows a curve instead. Tell the maker which you need, and measure how far a clip runs along each edge it cuts.

Should a cushion on a deep concrete ledge be box edge or knife edge?

Box edge. The straight side band keeps the outline square to the ledge and holds an angled corner as a clean line, which matters where a seat meets hard materials. A knife edge tapers to one seam and reads more like a pillow.

Can a very large window seat cushion be tufted?

Not always. When a buyer asked for a tufted velvet seat of about 84 x 59 1/2 in (214 x 151 cm) in one piece, tufting wasn't possible at that size, so the workshop made a flat, foam-filled, untufted cushion instead.

Porch light's on — Rosa

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